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Signs It’s Time To Replace Your Variable Frequency Drive

Signs It’s Time To Replace Your Variable Frequency Drive

The variable frequency drive, or VFD, is the silent workhorse of any industrial process. It manages the speed and torque of an electric motor and provides a safe and efficient mechanism to control industrial applications.

However, like any mechanical device, this regulator has a finite lifespan you can extend with proper care and maintenance, but sometimes replacement is inevitable. Recognizing the signs it’s time to replace your variable frequency drive will enable you to take preventative measures, ensuring the continuous, smooth operation of your industrial processes.

Unusual Noise or Vibration

It’s important to pay attention when your variable frequency drive starts making unusual noises or has increased vibration levels. These symptoms could indicate mechanical issues or faults within the system. If your VFD is making high-pitched squeals, slight buzzing noises, or vibrating more than usual, it could mean it’s on its last leg.


Overheating is a clear sign that your VFD is not performing optimally, which could lead to extensive downtime and repairs. A healthy VFD should be able to manage its temperature effectively. If your device is constantly overheating, you can ascribe this to a failing cooling system or other internal issues, and it might be worth considering getting a new one.

Frequent Unexpected Shutdowns

One common sign that your VFD might be approaching the end of its lifespan is when it starts having unexpected shutdowns frequently. These shutdowns can be irritating because they disrupt your operations and cause significant downtime. When the frequency of these shutdowns increases, it's probably time to start thinking about a VFD replacement.

Increase in Energy Consumption

A sudden and unexplained increase in energy consumption could indicate problems with your VFD’s performance. When it starts consuming more energy than usual without any changes in load or processes, it's an indication that the drive might be losing its efficiency. An energy regulator that doesn’t regulate its own consumption will lead to poor business operations and increased expenses.

Expired Warranty

An expired warranty is one of the main signs that it's time to replace your VFD. The expiration of a warranty can leave you uncovered for any future failures or repairs, potentially leading to costly service fees. If your VFD’s warranty expires and shows signs of poor performance, replacing the unit may be more cost effective.

While these signs may indicate potential problems with your VFD, they're not definitive proof that you need a replacement. However, they should prompt further investigation. It's essential to keep a close eye on the health of your device to ensure it continues to run efficiently and reliably to avoid unexpected breakdowns and costly repairs.


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